You can prepare the pie base before making the almond cream and preparing the rhubarb slices.
Take the pastry out about ten minutes beforehand. Place it between two large sheets of baking paper and roll it out. It should be fairly thin but not too thin. Check that you have rolled out enough dough to line a 20 cm diameter round tin and the edges.
Cut out the base of the pie, and the edges (if it is difficult to cut the edges because the pastry sticks, you can put it back in the fridge or freezer for a few minutes). Line the tin with the pastry and prick it with a fork.
Preheat the oven to 160°C. Place a sheet of baking paper over the base of the tart and cover with baking balls (or rice, or something else to put an even weight on the base).
Bake for 20 minutes, the pastry should turn golden. Remove the pie from the oven and leave to cool on a wire rack.
During this time you can prepare the almond cream. Once ready, pour it over the cooled pie base.
Bake for 15 minutes at 160°C.
Leave the pie to cool for a further ten minutes. Then, arrange the rhubarb compote on top of the cooked almond cream. Smooth with a spatula.
Place the rhubarb stripes to cover the pie and cut off the excess pieces with scissors. Save the scraps (you can add them to a compote, or mix them into a fruit salad, such as strawberries for example).
Set aside in the fridge and take it out just before serving.